STM8S103/105 Access line is our standard line of multi-purpose 8-bit microcontrollers. As the first-step upgrade for our lower-cost Value line, the STM8S103/105 Access line offers a wider variety of packages, memory sizes, features and factory programming service.
Based on our proprietary 16 MHz core, it features a full set of timers, interfaces (UART, SPI, I²C), 10-bit ADC, internal and external clock control system, watchdogs, auto wake-up unit and an integrated single-wire debug module.
The STM8S103/105 Access line offers up to 32 Kbytes of Flash program memory, up to 1 Kbyte of data EEPROM and up to 2 Kbytes of RAM. It is available in 32-, 44-, and 48-pin packages. It is most suitable for mainstream applications in the industrial, computer and consumer markets, particularly where large volumes are concerned.

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STM8S105S4
Mainstream Access line 8-bit MCU with 16 Kbytes Flash, 16 MHz CPU, integrated EEPROM
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STM8S105S6
Mainstream Access line 8-bit MCU with 32 Kbytes Flash, 24 MHz CPU, integrated EEPROM
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STM8S105C4
Mainstream Access line 8-bit MCU with 16 Kbytes Flash, 16 MHz CPU, integrated EEPROM
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STM8S105C6
Mainstream Access line 8-bit MCU with 32 Kbytes Flash, 16 MHz CPU, integrated EEPROM
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STM8S103F2
Mainstream Access line 8-bit MCU with 4 Kbytes Flash, 16 MHz CPU, integrated EEPROM
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STM8S103F3
Mainstream Access line 8-bit MCU with 8 Kbytes Flash, 16 MHz CPU, integrated EEPROM
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STM8S103K3
Mainstream Access line 8-bit MCU with 8 Kbytes Flash, 16 MHz CPU, integrated EEPROM
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STM8S105K4
Mainstream Access line 8-bit MCU with 16 Kbytes Flash, 16 MHz CPU, integrated EEPROM
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STM8S105K6
Mainstream Access line 8-bit MCU with 32 Kbytes Flash, 16 MHz CPU, integrated EEPROM